merrick



P .1931. F. w. MERRICK 1,823,059

SEWING MACHINE AND THE LIKE Filed April 14, 1925 2 Sheets-Sheet l Inventor:

Sept. 15, 1931. F. w. MERRICK I 1,323,059

SEWING MACHINE AND THE LIKE Filed April 14, 1925 2 Sheets-Sheet 2 Inventor Patented Sept.15, 1931 UNITED STATES FRANKVW. Mmmcx, or nos'ron, MAssAoHnsETTs SEWING Mncninnnm) rim LIKE "A pplicatipnfiled A pril1441925. seria1no.23,056.f

- Theinventionhas.relationto the class t Fig.5 is a plan viewillustrating the parts mechanisms comprising those which are em- L ployed for'the actuation of the workpene A tr'atlng tools of sewing machines, known commonly 'as needle-motions and ,awl-niotions, and. those employed for the actuation of other toolsv havingthe like reciprocating movements in diiferent machines. The invention comprises lIlllOIOVGd mech anisms of the said class, incorporating prin-- ciples providing for transmissionof power to the tool in mechanically advantageous manner from a cam or other rotating movement-initiating element providing also for production of a dwell ,o dwells of relatively'prolonged duration at desired points 1n [the tool-movement, without any special dwell or dwell-formation ofthe movementinitiating element-itself, for example the actuating cam in. case the movement is due to theaction of a cam; and providing fur ther for absorbing the shock which is incident to a change of direction in the movement of the tool,.at the-end of the stroke of the tool k in a given direction, so asto save the cam 01' other movement-initiatingelement, and the parts engaging therewith, from wear and strain incidentto such'change of direction. Certain'specific' phases of the invention consist'in novel and improved awl-actuating and needle actuating' mechanisms for sewing niach nes- ,The drawings show embodimentsot" the V features of'the" invention in mechanisms operatively coinbined with'the curved a-Wland needle of a curved needle sewlng machine for the actuatlonbf thesald cur-ved awl and needle.

t H Fig. lot the drawings is a side elevation illustrating thecurved'awl awl-actuating mechanisms, with the awl retracted.

. FigxQ is a side elevationillustratingthe' awl in-the advanced poslt on corresponding with penetration of the workthereby;

V Fig. 3 is aplan view illustratingthe parts in thepositions in which they are illustrated n F1g., 2."

Fig. is aside elevationillustrating the nis1n,iwiththe needle' retracted.

. curvedfneedle and needle-actuating mecha- Inthe case of tions in which they areillustr'ated andneedle-guard .22 being shown in F igs. 4,

5 and 6, arranged to swing around saidcenter 3 also. A portion ota work-table or support 4 is shown in the respective views. A rotating shaft is indicated at 5, and '6 is a camdisk fixed upon said cam-shaft and having its periphery formed with helical teeth 7, thereby constituting a helical gear which in practice. acts to transmit movement to a shfut tle orloop-taker (not shown) to rotate the latter; At Sis indicated a shaft supporting the primary levers 9 and which'areem ployed for transmitting movementto the awl i and needle, the said primary levers being capable of. turning independently" of each other. "The primary lever 9 is shownrnounted upon shaft8, in Figs.1',2and 3, while the primary lever 10 is shown mounted thereon in Figs. 4,5 and 6. V r v L the illustrated embodiment ofthe' invention, the cam-disk 6 has a camgroove 61 formed in one side-faceythereof, constituting. a cam which is utilized forfthe actuationbf' theawl 1',' and'a can1groove 62, shownby dotted lines, formed in the other.

face thereof, constituting a cam which is uti liz ed for'the-actuation ofthe needle 2. M

The awl-actuating train comprises the cam 61, the primary lever 9, atoggle-linki91, and

a secondary lever 92 which is operativelyenr gaged with awl-carrier Toggle-link 91 connects one arrn of lever 9 to one arm of lever 92. 1 Preferably, and inaccordance with one" phase of the invention, the secondary lever I 92 is engagediwith the awl-carrier 11 by means of a link 93conne'cting thesecon'd arm,

923,10]? lever 92 tothe awl-carrier. Primary lever 9,*moi1nted as aforesaid upon. shaft 8, isprovidedwith steam-follower 611 working.

now

in cam-groove 61. Secondarylever 92 in this instance is mounted upon cone-centers 921.

The needle-actuating train comprises the cam 62, the primary lever 10, a toggle-link 101, and a secondary lever 102 which is operatively engaged with needle-carrier 21. Toggledink 101 connectsone arm of lever l0 to one arm of'lever-l02. Preterably, andin accordance with one phase of the invention, the secondary lever 102 is engagedwith the needle-carrier by means of--a li'n-k 103con-- to :move thelevers 9, 9.2 and links, subse-' quentlyvintothe positions shownin Figs.2 and-.3'to actuate the awl-earrier and awl into the position occupied in Figs. .2 and .3 .in which position-the awl penetrates the said material in case the latter is present upon the work-table orv support. V p

"As ;.the;primary 'awl-actuating, lever :9 movesin the direction indicated bythe arrow in Fig. 11, toward the position shown, in Fig. 2, its forward arm- '901-a'cts through toggleli-nk 91130 pushthe-rear =.arm of secondary lever :92 downward in the drawings, rocking the-lever -92 so that' the forward arm of such lever acts through link 93- to rock the awl -carrier-.-and-awl from'their positionin Fig.,1 to their position'in 2 and 3. In' this movement of arm 901. the point of connection at between such arm and 'one enidiof. togglelink. '91iis carried toward acstraight line-extending from the axis of supportingjshitftfi to the point of conneetiony between'the other end ofthe toggle-link and the rear arm; 922 ot leven92. pThi's straightening of the toggle constituted bylever-arm 901. and toggle-link 91; gives-the advantageous action or the toggle in transmitting movement and power to lever 92andthe awl oarrierjandawl. At'the com pletion' of the-said movement the toggle-link and the connection,-points w and yare approximately. in thesaid-straight line, .Co-nsequently strain incident tothei' forcing of. the awl l-th'rough the material operated upon, and-astrain andvshock resulting from the momentum 01* secondary lever 92 and; the awl-f camier andawl at the moment of the termination of the-penetrating movement of the awl,

are transmitted along the said straight line tolthe supportingshaft 8 'and'absorbed by the latter and its bearings, without reaching cam 61 lthmghifthe powersreceiving arm et the Primary lever 10, mounted lever 9 and the cam-follower. This relieves the cam from the shock'and from the action which in the case of prlor mechanisms causes "excessive wear and deformation of the cam at -923of -secondary lever 92 is brought into straight line with the center on which lever 92 'turns and'the point of connection a between the other end of thelink andtheawl carrier.

This adds theadvantages-of the toggle-action between th e lever92 and the awlcarriegan d inY-addition causesstrains or shock at and near: the completion. of the penetratingimovement of the awl tobe transmitted to the center oflever 92 and beabsorbedby thesupporting bearings.

Both of the toggles embodied in the mechanism shOWn'inlBigsQ 1,2 and 3 are straightened at the same time. Consequently, the dwells of the two toggles occur at the same time, andthe conjoint e fiect thereof is secured. 'Theja'ction gives dwellinthe-actual movement I of theiawl-carrier .and .awl, continuing during the feed movement, such dwell being secured-without any special dwell-formation of the cam 61.. Through a considerable .portion of the action which straightens and bends the toggles. againthe awl remainsmotionless. LThe conjoint ac tion ot thetwo togglesIin bending {gives a quick withdrawal. movement of the. awl which it woul'dnot be 'practicableto produce by means-0t special shaping'of the cam, alone. The. absorption: of strain, and; shock by the lever-supports allows thecam-actuated movement to be operated at a inn-ch 5 higher rate of speed than would otherwise bepracticable i 1 j The needle-actuatingcam 62. is designed to move lever 10 and the associated parts'into the positionsshown in Figs. 4 and 5,, in which the needle-carrier. and needle. are retracted,

link 'lOlto push therear :arm of, secondary lever 102 forward, {rocking the lever so that the forward arm of such leverracts through link 103 to. rock-the needle-carrier and needle fromtheir position in Figs. 4; and l "5, to their positionrin Fig." 6. In this movement of arm100zthepointiof connection between such arm. and-one endfof link 101 is carried toward a straight line extending from the axis of supporting shaft8 to the point of connection cl betweentheother end of the Tif and its bearings.

toggle-link and the rear arm of lever 102. -This"straightening of the toggle constituted by lever-arm 100 and toggle-link 101 gives the .same'results in the case of the needle actuat- 'ing mechanijsmasin the case of the toggle of the awl-actuating.mechanism,that is to say inrespect'of producing a dwell of the needle in the projected position of the latter, and

inrespect. of causing the shock resulting from the termination of the thrusting movementof the needletobe taken 'upby shaft 8 The dwell of'the needle in the projected position of the lattertafi'ords ample time for passing the needle-thread around the hook-of -the needle. Preferably, the construction and arrangement are such that the link'103, also, is caused to operate as atoggle-link, through being carried into the relations shown in Fig. 4; as'the parts are actu- 'ated: to cause the needle to withdraw from the material operated upon, whereby the point of connection 6 between oneendof the link and the transmitting arm ofsecondary lever 102'is brought into approximately a straight line with the center on which lever 102turns and thepoint of connection f between the other end oft-he link and the needle-carrier. V Thiscauses strain or shock at the completion ofthe withdrawing. movement of the'needle to be transmitted to the center of lever 102 andbe absorbed by the supporting bearings.

The two toggles oi theneedle-actuztting mechanism act alternatelyone acting in the thrusting movementiof the needle and -the .other'acting in the withdrawing movement;

The former toggle acts at'the extreme of the needle *insertingi action, with the needle through the material, as just 's tate d. produc 'ing a dwellof the needle and taking up shock resulting from the ter-mination of-the-thrusting-movementd Theothentoggle acts atfthe extreme of the needle withdrawing action to take up shock resulting from. the termination of the said withdrawing action, as just during the feedanovement.

plated effecting each of such movements within 110 degrees of one rotation of said shaft 5. This precludes the employment ,of

any c-arnsfiexcept those of-comparatively simple and regular contour. ,The production of the required relative movements and dwells of theawl' and needle through the employment of cams of comparatively simple andregular contour is made possible "by means of the lever and toggle arrangements which have beendescribed l q nThe ball-joints shown at points m, n, at

the'opposite-ends of link 93 provide for. the

lateral movementsof the awl-carrier and awl What is claimed as the inventionis t "1. In mechanism such as specified, the combinatlonwith a. tool, a rotating movementinitiating element, a primary lever actuated by said element, and a secondary lever, of a toggle-link connecting said levers together and cooperating with an arm of said primary lever as a toggle-link which as the mechanism completes. the stroke of'the tool approaches and assumes dwellsrelations inwhich its effective length is substantially in line'with the center Hon'which said primary lever swings, and a toggle-link connecting-the secondary lever with'the tool and which at one extreme of the movements of the tool assumes relations in which its eiiective length is substantially in line with thecentcr on which said secondary lever swings. V

-. 2. In mechanism of the class specified, the

combination witha swinging curved work penetrating tool, a rotatlng cam, a primary leverdactuated by said, cam, of a secondary lever working around an axis separate from y 7 that of the tool, and operatively connected 7 i with the latter by a link, and asecond link connecting said levers together and cooperat= ing with an arm of said priniary lever as a toggledink which ;as the mechanism com pletes the penetrating stroke .ofthe tool approaches; and assumes a relation in whichits effective length is substantially inline with the, center on which said primary lever swings, soas totransmit to the pivot of the prlmary lever instead otto the cam the burden imposed by saidsecondary lever in bringing the tool toresta 1 3.. In mechanism of the class specified, the combination with a work-penetrating tool, a rotating. movement-initiating element, a pri-. mary lever actuated by said element, a secondary lever, a link connecting said-levers together, and a link connecting the secondary lever with the tool,.with the link first men+ tioned cooperating with an arm of the primary. lever as a to gle-link which asthe mechanism-completes the penetrating stroke of the tool approaches and assumes arelation in which its effective lengthis substantially in line with the centeron which said primary lever swinga and with ,the second link .ar-i

thetool approaches and assumes relation in which its eifectivedength is substantially in line with: the center on which said primary levertswingsand' with the second link arranged so that as .the mechanism completes the penetrating stroke it, the 'saidsecon'dl link, sappioacheszand assumes relations in which its effective length is substantiallyinlline with the center on which said'secondary'iever swings.

In mechanism of the class specified, the combination with a Work-penetrating tool, a rotating movement-initiating element, a primary lever actuated hy-said =element,:a secondary lever, a' link connecting said levers ti rgether, and a link connecting the secondary lever with the tool, with -the 'lin kfirst mentioned cooperating with an arm of the primary'lever as a toggle-link which as the mechanism completes the penetrating stroke efthe tool approaches and asSumesa'reI-atiOn "in which its effective length is substantiallyain line with the center i on which I said 5 primary leverswings, and with the se'eond linkerranged so that the mechanisnr completes thewithdrawing stroke'ofthe tool it, the said v second link, approaches and assumes relations v in 'li-ne-with the center ai y leverswings.

in which its effective length is siibstantially on 'whieh sai d-second- '6. Awl-oper'ating, mechanism comprising, incombination with 'a swinging curved.-avil,- a rotating movement-initiating element, a primary lever actuated by said 'element,-' and a secondary lever workingaronnd an axis separate fromthatof the awl and oper'atively connected with the latter, a link connecting said levers togetherand cooperating with an "arm 7 ofsai'd primary lever as a'toggle-link whi'ch, as the mechanisn completes theipenetrating stroke of the -awl, =approaches and assumes-a dwell-relation in which itse'liective lengthis si'ibsta'ntially' inline with the center on which said primarylever swings. l

Awl-operating mechanism comprising,

in combine ti on with an awl, a rotating meve 'mentdnitiatin gelement, a primary lever' aeg tuated by said element, a secondary lever, a; link connecting said levers together; and is,

zlinzk connecting the secondary levlerzwiitkthe 'awl, with the linkifi-rst :mentioned cooperatiing with an i arm of 'the' primary; lever as a V toggle-link which :as the :inechanism :com-

rpletesxthe r'penetrating stroke'" of the awlzsapzproaches and :assumes 5 az'nelati'on'zim which its effective I lengtluis substantially in 1 line i with the center on which, said *primaryizlever -'swings, aridnwith the second link arranged so that asxthe mechanism completes the said pen- 3etrating -'stroke-snchi link approaches and-assumes :relations' in which "its: effective .length is substantially in z-line with zthe: reenter zen which the -;secondazry:lever swings.

-8. Awlroperatin'gt mechanism comprising, in eombinatiomwitlr acurved awl, a'rswinging :awl-carrir, 1 a rotating I movement-initiatin g element, a primary lever a ctuated';by;-.said

element, "a secondary leveiy a 'link"connectling said-levers together; anda :lini: connectin g the 'secondary lever? witlrthe 'awl-carrier, with the linkhrst mentioned cooperating with anizrrmofthe primary leverasa toggleiink which as :the 1 mechanism completes the penetrating stroke 'of the awl approaches and: assumes a: relation: in 1 whichi its elfective length is sl-ihstantially in line with-the-cen- -t'ci'-.on--whichvsai'd primary 'lever:swings,;and witlr the second link arranged so thatxas the mechanism 'completes .thez-said vpenetrating strokesuch link-approaches and i assumes relations 5 in which its effective length is substantially in line with the center r on which the.- secondary I lever swings,

9. -Needle-operating*mechanism comprising, 1 in combination :witha swinging-curved needle, 'arotating -cam, a; primary: lever actuated by said cam, and a secondary lever working around an axis separate. from/that of the needle and 'operativel'y conneeted with the latter, and a linlcconnecting said levers together and cooperatingwithgan arm of said primary lever as a toggle link which: as :the 1 mechanism completes: thez penetratings stroke of the needle approaches.=and;assiimes dwell relations in which its eliectiveleng-th is substantially-in -l-ine; with ;the:cen ter'-' on; which said primaryw'leverrswings,- l

lOrNeedle-operating -meehanism rfor' 7' a V sewing: machine comprising,- in combination with a v needle, a: needle-carrier, a rotating cam,-,a prim'ary lever; actuated by said cam, a-secondaryilever, a link; connecting "the sec ondary leverwith the needle-carrienandra link connecting said levers together and coopenatin-g'with an; arm of-sa-id primary lever as'a toggle link which as the mechanism completes i the ;penetrating stroke of the needle app-roacheseand assumes} dwell-relations in which its veffective length is substantially in Y line with thecenter on;- which: d 1 primary ]ever-"swings. we 11. Needlesoperating "mechanism *for a curved needle": sewing maehine comprising, in recombination with a --e'urved needle, a

ine

VII

swinging needle-carrier, a rotating cam, a

primary lever actuated by said-cam, a secondary lever, aswinging link connecting the secondary lever with the needle-carrier, and a linkconnecting said levers together and cooperating with an arm of said primary lever as a toggle-link which as the mechanism completes the penetrating stroke of the needle approaches and assumes dwelkrela- V tions in which its effective length is substanv tiallyin line with the center on which said primary lever swings.

12. N eedle-operating mechanism for a curved needle sewing machine comprising, in

combination with a curved needle, a swinglng n'eed1ecarr1er, a rotating movement-1nltlating element, 'a prlmary lever actuated v by said element, and asecondary lever, a link connecting said levers together and cooperating with an arm of said primary lever as a toggle-link which as the mechanism completes the penetrating stroke of the needle approaches and assumes dwell-relations in 'which its effective length is substantially in line with the center on which said primary lever swings, and a second link which connects the secondary lever with the needlecarrierand which is arranged so that as the mechanism completes the withdrawing stroke of the needle it, thesaid second link, approaches and assumes dwell-relations in which its effective length is substantially in linewith the center on which said secondary lever swings. FRANK W. MERRIOK. 

